DNSJava vulnerable to KeyTrap - Denial-of-Service Algorithmic Complexity Attacks

published 2024-07-22 2y ago modified 2026-09-10 2mo ago

cvss: 6.5; version 3.1, GitHub
cisa kev: Not listed; not in CISA's catalog
epss: —; no score, EPSS covers CVEs only
public exploits: 0; none known

### Impact Users using the `ValidatingResolver` for DNSSEC validation can run into CPU exhaustion with specially crafted DNSSEC-signed zones.

### Patches Users should upgrade to dnsjava v3.6.0

### Workarounds Although not recommended, only using a non-validating resolver, will remove the vulnerability.

### References https://www.athene-center.de/en/keytrap

Patch / fix

fixed in 1 links 2

maven dnsjava:dnsjava 3.6.0

github.com/dnsjava/dnsjava@07ac36a commit
github.com/dnsjava/dnsjava@3ddc45c commit

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CVSS scores

assigned by	version	score	vector
GitHub	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	dnsjava:dnsjava	>=3.5.0, <3.6.0	3.6.0
maven	org.jitsi:dnssecjava	<=2.0.0	no fix listed

Classification

Weakness

CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

GitHub Advisory GHSA-crjg-w57m-rqqf

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